tourium good or bad

It should be "tourism", not "tourium".
Pros:
Enhance international image
Boost the economy
The economy will become more vibrant.
It enhances our job opportunities.
it promotes Hong Kong cultures.
Hong Kong is the melting pot of different cultures.
Hong Kong will be the place where East meets West.
We can meet people from all walks of life / all over the world.
We can broaden our horizons by meeting people from different countries.
We can polish our listening and speaking skills by communicating with English native speakers/ foreigners who come to Hong Kong.
It can enhance the international flavour in Hong Kong.
It is beneficial to cultural exchange.
We can establish friendships with people from different countries.

Cons:
Over-crowded streets
Inflation in Hong Kong
Tourists may destroy the herritage in Hong Kong.
Tourists who are not cultivated may litter, spit or excrete on the streets. It is harmful to public hygiene.